Rounding machine



April 19, 1938- F. E. BERTRAND 2,114,363

ROUNDING MACHINE Filed March 16, 19:57 4 sheets 'shee-z 1 F. E. BERTRAND ROUNDING MACHINE April. 19, 1938.

Filed Mafch 16, 1937 4 Sheets-Sheet 2 AWE/WEE.

F1 4L. a

April 19, 1938. E BERTRAND 2,114,368

ROUNDING MACHINE Filed March 16, v1937 4 Sheets-Sheet 3 April 19, 1938. F. 'E. BERTRAND 2,114,368

ROUNDING MACHINE Filed March 16, 1937 4 Sheets-Sheet 4 Wv A/TUR WM QE\&M kawh V hmf Patented Apr. 19, 1938 UNITED STATES PATENT OFFICE ROUNDING MACHINE Application March 16, 1937, Serial No. 131,209

Claims.

My invention relates to machines by which work-pieces, such as soles or insoles for shoes, are produced with the desired peripheral contours. I

In Letters Patent of the United States No. 2,057,665, Bertrand, October 20, 1936, is disclosed an apparatus by which an outsole is cut from sheet-material by one knife, while, simultaneously, a second knife produces in the material an incision corresponding in outline to the periphery of an insole. It is an object of this invention to increase the range of sizes to which a machine of this character is applicable, especially as to large work, the apparatus being efiicient, free from interference and convenient to operate. To this end, improvements are made in the actuating mechanism for the knives, two pivoted arms being employed, one for each knife, these turning about an axis common to both; a spring for urging toward the work the knife upon one of the arms, as the secondary knife or that for outlining the insole, is carried by an enclosure for the spring of the other arm, the connection between the thus-carried spring and its arm being made by an extensible member;

oscillation of the secondary arm about its pivot and movement of the knife-mounting upon the arm is controlled by a lever or member shiftable in a plane substantially parallel to that of the pattern; a handle by which this lever member may be actuated is movable, as under the influence of a spring, to a normal, inactive position; effective connections are provided by which the controlling movement is transmitted from the lever to the knife-mounting; the knife is supported and adjusted by novel means; and said knife is caused to follow accurately the pattern through the use of a special link-support for its block and an auxiliary spring acting upon the block. While my invention is especially applicable to machines in which two knives are employed, it is to be understood that some of its features may be utilized in single-knife apparatus. In the accompanying drawings, illustrating one of the several possible embodiments of my invention,

Fig. 1 is a broken, top plan view of the machine; Fig. 2, an enlarged, vertical, sectional detail through the pivotal support for the knife-arms; Fig. 3, an enlarged detail in elevation, showing the mounting and controlling means for the secondary knife;

Fig. 4, an enlarged vertical sectional detail of the controlling means for the secondary knife; Fig. 5, a similar view on the line VV of Fig. 1;

Fig. 6, an enlarged detail in elevation and with parts broken away, particularly showing the secondary knife-block and its supporting holder;

Fig. 7 is a perspective view, with the elements of the holder and the block separated; 5

Fig. 8, an elevation of one of the block-supporting links;

Fig. 9, a top plan view of the holder, and

Fig. 10, a broken, enlarged detail in elevation of the spring for the secondary arm, together with its supporting and connecting means.

In Fig. 1, there appears at In the rotary knifeactuating table of the well-known Planet sole rounding machine with its pivoted member l2, upon which is movable the slide 14 revoluble under the influence of the table. The primary arm it with its knife l8 (Fig. 6), which, in the present apparatus and that of the previously mentioned patent, produces an outsole, is guided in its travel resulting from the rotation of the table by a horizontal pattern 20. This pattern and an opposed insole-pattern 22 are mounted in a normally stationary position upon the frame of the machine, being movable relatively to each other to clamp for the operation upon it a blank W of sheet-material. The knife-arm l6 turns about an upward projection from the slide I4, this being furnished by a sleeve 24 which surrounds a pin 26 (Fig. 2). The pin has a head extending over a secondary arm I9, to which it 30 is secured by screws 28. At its lower extremity, the pin receives a screw 30, which, by engagement with the under side of the slide, holds the arm-' assembly against displacement. The two arms are thus pivoted one above the other about a common axis, they acting independently of each other, presenting the knives advantageously at all portions of the peripheries of the patterns and being equally capable of a wide range of movement to provide for the cutting of all sizes of soles and insoles.

Carried upon the slide l4 below the arms I 6 and I9 is a casing, of which the cover 32 is shown in Fig. 1 and containing the usual spiral spring 34 acting through a pinion 36 and gear-segment 38 to urge the knife 18 upon the arm l6 into active relation to the pattern 20 and to the work. On the slide l4 beyond the end of the arm I9 is carried a casing 40 containing a spiral spring #2 attached at its outer end to the casing. This may be arranged as is best shown in Fig. 10 of the drawings. Turning upon the slide, in what may be an extension from the cover 32, is a vertical post 44 about which the casing 48 is rotatable. The inner extremity of the spring 42 is secured to the post. In the upper portion of the casing is a groove in which is fastened one end of a cord or cable 46, the other extremity of which is joined to the arm I9. The force of the spring is thus applied to urge the free end of the arm I9 toward the pattern 22, the cord furnishing a flexible, extensible connection. The normal tension of the spring 42 may be varied by rotating the post, as by a wrench applied to a squared portion 48, through the desired angle, at which it is retained by a spring-actuated detent 50 pivoted upon the slide and engaging some one of a plurality of notches formed in the periphery of a disk 52 fast upon the post. Said post may be more securely fixed in its adjusted position by a pin 54 carried by the slide. All these tensionapplying members may be so fully removed from the associated elements that there will be no interference, whatever the extent of movement.

At the outer end of the arm I9 are spaced upper and lower branches 56, 56 (Fig. 3), through which is a bore to receive a stem 58 forming a portion of a slide which is one element whereby a secondary or incising knife 60 is moved vertically into and out of engagement with the material W. To force the slide down and the knife 80 toward the work, a spring 62 is contained in a bore in the stem 58, abutting at its upper end against a bridge-piece 64 rising above the upper arm-branch 56. To lift the slide and thereby free the knife from the work, a plate 66 fast upon the upper extremity of the stem has extending downwardly from it a pin or projection 68 resting upon one arm of a lever 70. The lever is fulcrumed upon a horizontal spindle I2 and has a second arm of generally U-shape (Fig. 1) from which rises an extension I4 (Figs. 3 and 4). A horizontal link I6 unites the ex tension to one arm of a lever I8 fulcrumed for horizontal oscillation substantially parallel to the plane of the patterns 20 and 22 about a post 80 extending upwardly from the arm I6 through a slot 82 in the arm I9. A second arm of the lever I8 is furnished by a handle 84. Preferably, the handle is pivoted upon an upstanding portion of the lever and is normally turned inwardly out of the way by a spring 06. When the operator desires to withdraw the knife 60 from the work, he turns the handle outwardly through 180 and swings it horizontally to the right, as viewed in Fig. 1. This, through the previously indicated chain of connections, tilts the lever I0 away from a stop-screw 88 threaded through the arm I9, against which it is normally held by the spring 62, and lifts the slide by engagement with the pin 68. When the point of the knife has been thus raised above the plane of the material, the plate 68 of the slide contacts with the bridge 64. The force applied to the handle 84 is now effective to turn the arm IS anticlockwise about its pivotal axis against the force of the spring 42, so the secondary knife-carrying elements are separated from the work by successive vertical and horizontal movements. The movement of the handle carries the arm of the lever to which the link I6 is attached past the axis of the post 80, so it is held until the operator turns it oppositely, thus freeing the arm I9 to be swung in by the spring 42 and allowing the slide 58, B6 to be lowered with the knife I50 by the spring 62. Upon release of the handle by the operator, the spring 88 returns it automatically to its normal inward position.

Shown as forming a part of the slide 58, 66 is a carrier-arm 90 for the knife 60, this arm being normally secured to the stem 58 by a tapered pin 92. The arm may be adjusted upon the stem in two directions at right-angles to each other. A screw 94 threaded horizontally through the arm I9 varies the angular position of the carrier-arm 90, and consequently the amount by which the knife 60 may be caused to lead the knife I8 cir-- cumferentially of the patterns in its action upon the work. It also resists the thrust produced as the knife 60 makes its cut. A vertical screw 96 is threaded into the carrier-arm and has upon it spaced portions 98, 98 lying at opposite sides of a lug I00 projecting from the slide-plate 66. R0- tation of the screw raises or lowers the arm to provide for a preliminary positioning of the knife 60 with respect to the plane of the work. After these horizontal and vertical adjustments are effected, the arm is fixed upon the stem by the pin 92.

Referring particularly to Figs. 3, 6 and '7, the carrier-arm 90 has pivoted on it to turn about a vertical axis a stem I02 rising from a holder I04. Guided in the holder between a vertical fixed wall I06 and a separable wall I08 is a knife-block III). In this block, the horizontal shank II2 of the knife 60 may be fastened in the usual manner. The block is supported upon the holder by a pair of links H4, H8 to oscillate toward and from the pattern 22. These links have a width substantially that of the block, and the opposite extremities of each are rounded at I I8 to enter laterally and be retained by recesses I20 formed in both the holder and block. Abutting against a projection I22 from the block and a screw I24 threaded through a plate I26 attached to the outer end of the holder is a spring I28 urging the block and knife toward the pattern, this spring passing through an opening I29 in the link H8. The holder has a face I30 somewhat extended horizontally. This, riding upon the periphery of the pattern, guides the knife 80 through the greater part of its travel and by its horizontal extent prevents the knife from tilting unduly about a vertical axis and thereby maintains it in a definite angular relation. This desirable contact-length will, however, as may be seen upon reference to Fig. 9, bridge across some portions of a pattern, as at the inside of a hollow shank. Up to this time, the greater force of the spring 42 will overcome that of the spring I28, and the effect will be as though the knife were secured directly in the holder. When bridging occurs, the spring I28 forces the rounded end I32 of the block out from the holder, and causes it and the knife 00 to follow accurately the concave portion of the pattern. Adjustable vertically in ways I34 upon the holder I04 is an arm I36 fixed in place by a slot-andscrew connection i38 and raised and lowered upon the holder by a screw I40, the head of which enters a slot I42 in its side. The arm I38 has a contact-face I44 upon the under side of its inner end, which, resting upon the upper surface of the work-piece W, limits the downward movement of the knife 60 and therefore the depth of the incision outlining the insole.

When a rounding operation is to be performed by the machine, the primary arm I'B is found held in its normal inactive position, as by the usual latch-lever I46, resisting the force of the spring 34, both knives I8 and 60 being removed from the patterns 20 and 22. The secondary arm I9 is drawn back and retained by the lever I8, with the mounting-slide 58, 68 and the'intermediate elements raised, so the knife 60 is above the plane which the upper face of the work is to occupy. The patterns 20 and 22 are separated, and bevertical registration with the outsole-knife I8 will have been adjusted by the screw 94, and the approach of the insole-knife to the material by the screw 96, each of these varying the position of the carrier-arm 90 upon the mounting-stem .58. The arm I6 is released to transfer the knife 10' I8 to its operative position, and the operator draws the handle 84 forward and turns it clockwise (Fig. 1) to carry the crank I8 past the center. This first permits the spring 42 acting through the cord 46 to draw the arm I9 into its active position, with the knife Ell against the periphery of the pattern 22, and then the spring 62 to lower the mounting until the knife enters the material ready to produce its out. The machine being started in operation, the table I0 and the other supporting elements cause the travel of the two knives about their patterns, so the points of operation are shifted to form from the piece W an outsole and to outline insaid piece an insole. At the convex and flatter concave portions of the periphery of the pattern 22, the surface I3II of the holder I04 acts as a guiding means for the knife 60, the knife-block IIII being held back with its supporting links H4 and H6 by the excess of strength of the spring 42 over the spring I28. But when more abrupt concavities of the pattern interfere with the normal relation of the holder and knife to the pattern, the spring I28 urges. the block in beyond the surface I39, so its knife is caused to follow the correct path. When the machine stops, the operator reverses his acts above outlined, drawing forward the handle 84, thus turning the lever I8 to successively lift the knife 60 from the material and swing out the secondary arm I9, then withdrawing the arm I6 and knife I8. The patterns are separated, and the completed work removed.

Having described my invention, what I claim as new and desire to secure by Letters Patent of the United States is:

1. In combination, two patterns, a support, two arms pivoted upon the support about an axis common to both, a knife mounted upon each arm, the knives being guided by the respective patterns, means for causing movement of the points of operation of the knives about the patterns, and means for urging each arm and its knife toward the corresponding pattern;

2. In combination, two patterns, a revoluble support, a pin carried by the support, two arms surrounding the pin and movable one above the other upon the support, a knife mounted upon each arm, the knives being guided by the respective patterns, and a spring individual to each arm for moving its knife toward the corresponding pattern.

3. In combination, two patterns, a revoluble support, a pin rotatable in the support, a sleeve surrounding the pin, an arm pivoted about the sleeve, an arm secured to the pin, a knife mounted upon each arm, the knives being guided by the respective patterns, and means for urging each arm and its knife toward the corresponding pattern.

4. In combination, two patterns, a support provided with a projection, two arms pivoted upon the projection, a knife mounted upon each arm and co-operating with one of the patterns, means for causing movement of the points of operation of the knives about the patterns, a spring carried by the support and acting uponone arm to urge its knife toward one of the patterns, and

a spring carried by the support and acting upon the other arm to urge its knife toward the other pattern. 7

5. In combination, a pattern, arms revoluble about the pattern and movable toward and. from said pattern about a common axis, a knife mounted upon one of the arms, and a spring carried by the other arm and acting to urge the knife intcco-operation with the pattern.

6. In combination, two patterns, two arms revoluble about the patterns and movable toward and from respective patterns about an axis common to both, a knife'mounted upon'each arm and guided by its pattern, and a spring individual to each arm and acting to urge the knife thereof into cooperation with the pattern,

the springs being supported at the ends of the arms. I

'7. In combination, two patterns, a revoluble support provided with a projection, two. arms pivoted upon the projection, a knife mounted upon each arm, the knives being guided by the re-' spective patterns, a spring carried by the support and acting to urge one arm and itsknife toward the pattern, a casing carried by an enclosure for the spring of the last-mentioned arm, a spring contained in the casing, and a flexible member joining the spring to the other arm.

8. In combination, a pattern, apivoted arm revoluble about the pattern, a knife-mounting movable upon the arm, a knife carried bythe mounting, means acting upon the arm and mounting to urge the-knife into active co-operae tion with the pattern, and a member movable to control the oscillation of the arm about its pivot and the movement of the knife-mounting upon the arm.

9. In combination, a pattern, a pivoted arm revoluble about the pattern, a knife-mounting movable upon the arm, a knife carried by the mounting, means actingupon the arm and mounting to urge the knife into active co-operation. with the pattern, and a lever movablein a plane substantially parallel to the pattern tocontrol successively the oscillation of the arm about its pivot and the movement of the' knife-mounting upon the arm.

10. In combination, a pattern, a pivoted arm revoluble about the patternga knife-mounting movable upon the arm, a knife carried by the mounting, means acting upon thearm and mounting to urge the knife into active con-operation with the pattern, a member movable to control the oscillation of the arm about its pivot and the movement of the knife-mounting upon the arm, and a. handle pivoted upon the member to move between active and inactive positions.

11. In combination, a pattern, a pivoted'arm revoluble about the pattern, a knife-mounting movable upon the arm, a knife carried by the mounting, means acting upon the arm and mounting to urge thekmfe into active co-operation with the pattern, a member movable to control the oscillation of the arm about its pivot and the movement of the knife-mounting upon the arm, a handle pivoted upon the member to move between active and inactive positions, and a spring urging the handle normally to its inactive position.

12. In combination, a horizontal pattern, means for clamping work against the pattern, a pivoted arm revoluble about and movable toward and from the pattern, a knife-mounting movable upon. the arm to present the knife to the work and to withdraw it therefrom, a lever fulcrumed upon the arm to move horizontally and acting upon the mounting to withdraw the knife, and a member movable horizontally to actuate the lever,

13. In combination, two patterns, a primary and a secondary arm revoluble about and pivoted to oscillate toward and from the respective patterns, a knife carried by the primary arm and co-operating with its pattern, a knife-mounting movable upon the secondary arm, and a lever fulcrumed upon the primary arm and movable to turn the secondary arm about its pivot and to shift the knife-mounting thereon.

14. In combination, two patterns, a primary and a secondary arm revoluble about and pivoted to oscillate toward and from the respective patterns, a knife carried by the primary arm and co-operating with its pattern, a knife-mounting movable upon the secondary arm, a post extending from the primary arm through an opening in the secondary arm, and a lever fulcrumed upon the post and movable toturn the secondary arm about its pivot and to shift the knife-mounting thereon.

15. In combination, a pattern, an arm revoluble about and movable toward and from the pattern, a slide movable upon the arm, a carrier member mounted to turn upon the slide, means arranged to fix the carrier member in different positions upon the slide, a knife-holder arranged for pivotal movement upon the carrier member, and a knife carried by the holder and co-operating with the pattern.

16. In combination, a pattern, an arm revoluble about and movable toward and from the pattern, a slide movable upon the arm, a carrier member mounted to turn upon the slide, means arranged to fix the carrier member in different positions upon the slide, means arranged to limit variably the angular movement of the carrier member upon the slide, a knife-holder arranged for pivotal movement upon the carrier member, and a knife carried by the holder and co-operating with the pattern.

17. In combination, a pattern, an arm revoluble about and movable toward and from the pattern, a slide movable upon the arm, a carrier member mounted to turn upon the slide, means arranged to fix the carrier member in different positions upon the slide, means arranged to limit variably the angular movement of the carrier member upon the slide, means arranged to raise and lower the carrier member upon the slide, a knife-holder arranged for pivotal movement upon the carrier member, and a knife carried by the holder and co-operating with the pattern.

18. In combination, a pattern, an arm revoluble about and movable toward and from the pattern, said arm having spaced terminal-portions in which are alined openings, a plate having a guide-stem slidable in the openings, there being an extension from the plate, means contacting with the extension to raise the plate, and a knife movable with the plate and co-operating with the pattern.

19. In combination, a pattern, an arm revoluble about and movable toward and from the pattern, said arm having an opening, a plate having a hollow guide-stem slidable in the opening, there being an extension from the plate, a spring situated in the stem and acting to urge the plate downwardly, means contacting with the plateextension to raise the plate, and a knife movable with the plate and co-operating with the pattern.

20. In combination, a pattern, an arm revoluble about and movable toward and from the pattern, said arm having an opening, a plate having a guide-stem slidable in the opening, a carrier member variable in position upon the stem, 2. knife-holder pivoted upon the carrier member, and a knife carried by the holder and co-operating with the pattern.

21. In combination, a pattern, an arm revoluble about and movable toward and from the pattern, said arm having an opening, a plate having a guide-stem slidable in the opening, a car rier member variable in position upon the stem, at knife-holder pivoted upon the carrier member, screws carried by the arm and plate and arranged to vary the position of the carrier member in different directions, and a knife carried by the holder and co-operating with the pattern.

22. In combination, a pattern, an arm arranged to move toward and from the pattern, the arm and pattern having a relative operating movement, links mounted tooscillate upon the arm, a knife-block pivoted upon the links, a knife fixed in the block, and means for forcing the block and knife into co-operation with the pattern.

23. In combination, a pattern, an arm arranged to move toward and from the pattern, the arm and pattern having a relative operating movement, links mounted to oscillate upon the arm, one of the links being provided with an opening, a knife-block pivoted upon the links, a

spring extending through the link-opening and acting upon the block to urge it toward the pattern, and a knife fixed in the block.

24. In combination, a pattern, an arm arranged to move toward and from the pattern, the arm and pattern having a relative operating movement, a holder mounted upon the arm and provided with a guideway, a knife-block movable in the guideway, and links pivoted upon the holder and supporting the knife-block.

25. In combination, a pattern, a revoluble arm arranged to move toward and from the pattern, a holder mounted upon the arm and provided with a guideway, a knife-block movable in the guideway, links pivoted upon the holder and supporting the knife-block, and a spring interposed between the holder and knife-block to urge the block toward the pattern.

FREDERIC E. BERTRAND. 

